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Patent Searching and Data


Title:
LIQUID CRYSTAL ORIENTING AGENT
Document Type and Number:
Japanese Patent JPH07120768
Kind Code:
A
Abstract:

PURPOSE: To obtain a liquid crystal oriented film showing a stable oriented state of the liquid crystal and a pretilt angle without depending on the process conditions or the use environment and having good electro-optical characteristics by incorporating a polyamide acid containing aliphatic tetracarboxylic acid dianhydride as an essential component and a polyamide acid containing aromatic tetracarboxylic acid dianhydride as an essential component.

CONSTITUTION: This orienting agent for a liquid crystal contains a polyamide acid containing aliphatic tetracarboxylic acid dianhydride as an essential component and a polyamide acid containing aromatic tetracarboxylic acid dianhydride as an essential component. When a compd. expressed by formula I is used as the polyamide acid containing aliphatic tetracarboxylic acid dianhydride as an essential component, especially excellent characteristics as a liquid crystal oriented film can be obtd. When a compd. expressed by formula II is used as the polyamide acid containing aromatic tetracarboxylic acid dianhydride as an essential component, especially excellent characteristics as a liquid crystal oriented film can be obtd.


Inventors:
ASAKUMA SUMITOSHI
EGUCHI TOSHIMASA
Application Number:
JP26874993A
Publication Date:
May 12, 1995
Filing Date:
October 27, 1993
Export Citation:
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Assignee:
SUMITOMO BAKELITE CO
International Classes:
G02F1/1337; C08G73/10; C08L79/08; (IPC1-7): G02F1/1337; C08G73/10; C08L79/08